Type-writing machine.



A. J. BRIGGS. TYPE WRITING MAHINB. Y Brummen uns 9120.1.' 1901;x

Patented Jan. 25, 1910.

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ATTDRMY' writing machine havin my -and parts omitte "through the center of the ribbon spools.

typewriter of the st)7 UNITED STATES AinertesT OFFICE.

Immun J. smoes, or snacusn, NEW 'Yonmkassienonu 'um mrt:

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Application Med Deeeniber To all whmwit may concern:

Be it known that I, ARTHUR J. Bmocs citizen of the United States, and resident o yracuse, in the county of Onondaga land htate of New York, have invented certain new und -useful Im rovements in TypelVriting'Machines, oi3 which the following is a specification.

My invention relates to typowriting machines and more articularl f to the ribbon feed'mechanism oi) such'mac ines. n

My invention has for its principal ob ect to improve incertain respects the rib on feed and reversing mechanism shown in the a plication of A exander-T.` Brown, filed arch 12, 1906, Serial No. 305,561.

My invention consists in certain features of construction andV combinations and arrangements of lpeli-ts, all of which .will be fully set forth'herein and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a Vrear elevation ofva.` portion of a typeinvention em- (purtsf eing broken awa Fig. 2 is a fore and a t vertical sectional view of the same. Fig. 3 is a rear view partly in vertical section bodied therein,

Fi ..4 is a toplplan vijew of certain cams ang followers fconstituting parts' of the au tomatic reversing mechanism. Fig. 5 1s a fragmentary view in section and on an enlarged scale 'and showing the ,end of a certain detent spring and the roller with'which it cperates.

I have shown my invention embodied 1n 'a le known commerciallly;

`aslthe Smith Premier No. 10 or the Smi Premier visible typewriter. This machine basa carriage 10 which supports a platen lagainst the front face of which types 12 y pelled by a'spring V A. .1 .l5

' ffeed Vrack 15 on the carria f shown. The gears 14 and 16 are mounted are adapted to strike. This carriage 1s pro:- 13 one end of which is conf n ected with a gear e."4 Another gear 16 mounted at the side o the driving gear 14, is geared to a'n yescapementdevice, not

on a shaft 17 which issupported in a frame 18 secured to the top plate of the machine.

The ribbon spools 20 and'21 are mounted Vby side at the back of the typewriter i andithe' ribbon 22- is led upward and forward from said spools and is* threaded' l The left-hand end vo the 14 that meshes with a Bpecication of Letters Patent. Ptentcd Jan. l25, 1910.

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through a vibratf-ry -ribhon guide 23 which normally stands 'below the rioting oint, as shown in Fig. 2 and whic is adapiied to be moved upward to cover the rinting point at each operation of a. ty e. beribvon spools are driven to' feed t ie ribbon "by means of a shaft 24 lying transversely of the machine and journaled in the frame 18. Just below the shaft 17 said shaft 24 has fixed thereon -a spiral gear 25 which meshes with a spiral gear 26` loosely mounted 'on the shaft 17 and having ri id therewith n ratchet wheel 2T. Said ratc et wheel is engaged by owls 28- mounted on' the gear wheel 16. fhe construction is such that the shaft A24 will be turned toward the'rear of the machine4 whenever the carriage is moving toward the'let but will not be turned when the carriage is moving toward the right. AThe shaft 24 has a'hand crank 30 mounted thereon'b 'means 'of which said shaftwan beturne at any time independently of the carriage, turning idly under its pawls 28.

The spool 20 is mounted on a collar 31 which is rigidly mounted on the righthand end of the shaft 24 where said shaft projects beyond the frame 18, said collar, in effect, constituting a part of the shaft. The 'colla-r 31 is formed at its ends with an enlargement 32 which revexits the spool from slipping oit' the en of the collar. This spool is loosely mounted on the collar so thatl said spool and collar can turn indo pendently' of each other. i

The s ool 21 is -detachahly mounted in the mac ine by means of a spring-pressed puppet 3? which is'slidably mounted in a racket 34 dependin from the top plate. I pup et 33 abuts' the right-hand 'end of the 'cdl shaft-24 and enters a shallow depression in the end of saidV collar'. The spool 21 is looselyniounted on the puppet and it can be removedby drawing the puppet out endwise a instthe tension of a 4sprin (not shown). T is detachable ribbon spo is the invention of Edward A, Goodhue, and is described and claimed in themap lication of said Goodhuc, tiled August 27t 1908, Serial No. 450,487. Each 'of the spools 20and 21 is forined with a series of ratchet teeth 35 struck out from the finnges thereof, the teeth being on the adjacent flanges of the two spools; that the ratchet wheel 2^( the arms 52 and 53, is pressed upward is to say, on the ri htfhandflange of the spool 2O and on the oft-hand flan e of the s ool 21 as viewed from the front 0 the mac ine. The teeth 35 are adaptedto be en` gaged by a dog 36. which yis in the nature of a lever of the first order pivoted on a pin 37 assing throuvh the collar 31 and the sha t 24. Said dog lies in a, slot 38 cut diametricallv of the shaftrand collar and cut in endwise of said shaft-'and collar `from the righthand end thereof. The dog 3S is shown in Figs. 1 and 3 engaging the spool 20 but by rocltino' it about its pivot 37 it can be made to release said spoo 2x1 and to enga e the spool 21 and it is by rocking this dog rom one of the ositions to the other that the direction of 'eed is reversed. The dog 3G projects beyond the sleeve 3l onl both sides thereof as shown iii the drawings. The end of said do opposite' the spool-engaging end thereo terminates in a t1 ip iig device having the forni of a pin -fl-Q having a grooved roller 41 mounted thereon. 1 his roller is engaged by a plate spring 42 which is' secured to one side of the sleeve 31 by means' of a pair of screws 43. The free end of the spring 42 is bent toward the roller 41 and is pointed as shown iii Fifr. 5` at 44. This pointed end of the spring dies in a peripheral roove in the roller 41 and prevents said ro Ier roxn'fallingoff of the pin 40. The point 44 is midway of the two shifted positions of the roller 41.` pointed s ring is adapted to hold said roller and the og 3G in eit er of its' shifted positions an'd to press said dog with 'a sight spring pressure against whichever one of the ribbon spools is being driven. The pin 40 is rolonged beyond the roller 41 and the eng of said pin is adapted to coperate with two cams 45 and 46, forming parts of the automatic reversing mechanism. fliese cams are mountedon n bracket 47 which is secured to the lower forward part of the fraine `18 by means of screws 48., Said bracket has two upturned ears 50 4which carry a ivot rod 51 that lies a little hel-ow the forwrd parts of the spools 20 and 21. :The cam 45 is formed on an arm 52 that ldrojects toward the rear of the machineA om the rod 51 on which said arin is piqtgted. The ami 52 is bent up .from another; rm' 53 which constitutes-a follower adapte 'to `be pressed against the ribbon that, isA wound on the spool 20. One end of the arm 53 has another ear 54 bent n therefrom and pivoted on the rod 51. Tiisframe, comprsiig .Y means of a spring 55 coiled 'about the rod'51 and at, one end lyinflr under-"the arm 52 and at the 'other end und-er a c ross rod 5G of the bracket 47. The cam 46;'isformed on the.A forward end of an arm 57 of a frame simi*- lar to the one just described and including This an arm 58 which acts a`s a fgllower for Athe ribbon on the spool 21. AThe frame 57, 58 is controlled by a spring G0 which acts in the same manner as the spring 55. The two frames are spaced apart on the rod 51 by means of a collar 61.

In Fig. 4 the general position of the spools 20 and'21 is indicated by broken lines and it will be seen that the follower arms 58, 5S, pome between the flanges of the res )ective spools and that the cams 45 and 46 he between the spoolsthemselves. Each of said cams consists ofan ear beiitoff from the respective arms 52, 57 and made on an incline or bevel.- lVhen the ribbon is substantiallyf; exhausted from either of the spools the correspondinv follower 53, 58 will have been moved up by its spring 55, 60 to such a position that the corresponding cam 45, 46 will have moved into the path of the pin 40. Said piii engaging saidcam will' be moved toward the right or toward the left as the ,case may be, throwing the spool-engaging end.of the dog iii the opposite direction. The cum 45 is adapted-to push the pin 40 away from the spool 20 and 'this acts to. force the engaging end of the dog into engagement with said spool 2O and a similar thing is true ofthe cam 4G. It will be noted in Fig. 4 that one of these 'cams stands in advance of the otherso that there is no interference between the two cams. In order to prevent the cams from` moving too high when the Aspool 21 is removed from the machine, an arm G2 projects from one of the ears of thed frame comprising the cam 46 and follower 58, and said arniis adapted to strike the rod 5G and thus limit the upward motion of said cam and follower. An arm or ear is bent oli from the arm 5T and lies above the arm 52v of the cam 45 and holds said cam down when the follower 5S is held down. These features, however, are not of my invention.

In orderto reverse the direction of ribbon feed by hand the shaft 24 is formed with a longitudinal roove in which lies a wire 64 which exten s nearly the entire length of the shaft; At its inner end this wire profjects into' the slot 38 wheret is bent up as shown` at ('5 -into a notch 66 formed inV the dog 36. The outer end of the wire (54 is bent outward as shown at G7 where it enters a suitable hole in a collar G8 loosely mounted on the shaft 24 and having a milled head. The dog 36 can be shifted to either of its two positions by sliding 4this collar by hand to the right or to the left as the case may be.

In the application of Alexander T. Brown 'hereinbefore referred to, two ribbon spools shown herein and they are enga ed y a4 pivoteddog adapted to be shifte Vinto enagement with either spool. This dog was, owever, pivoted on the`outside of the sleeve isr :sc ,that when the ribbon was which corresponded to the'l sleeve 31 in the present case, and said sleeve had to be squared or liattened for this .purposa The roller Vwhich corresponded to the roller 41 was on the wheel-engaging end of the dog exhausted from one of the spools the cam controlled bythat "spool had to pull the follower toward the to accomplish this ,the cams4 spool. yIn order were made in a form that was much less Vconvenient to manufacture thanthat shown in the present case and a form in which said cams werel not asrigid as those shown in the present case. The present construction is simpler to manufacture, is more rigid and positive in its action and is in several vrespects an improvement over that shown in the Brown application.

Various changes can tails of construction and arrangement without departing from my'invention.

What I claim as new and desire to secure by Letters Patent, is: a

1. In a' typewriting machineand in ribbon mechanism, 4the combination of two ribbon spools arranged side by side, a driving shaft coaxial with said spools, 'a dog piv otally mounted on said driving shaft between said spools and shiftableiabout'i'ts pivot into engagement with -either spool, said dog consistingof a lever ofthe first order having one'of its ends formed to enga e the ribbon spools and having a tripping evice at the other end `the ribbon on said spools and arranged to come intothe path of said tripping device when the ribbon is substantially exhausted from one of the spools, cach of said canis being arranged to p .ish said tripping device away from the corresponding spool and thus to throw the spool-actuating end of the dog into engagement with Said corresponding spool.

2. In a typewijiting machine and in rib" bon mechanism, the combination of a pair of ribbon spools arranged side driving shaft passin spools and having through, a dog pivoted between its ends in said sl-iit and having one of its ends arranged lo engage either spool, a tripping device on made in the de-4 and two cams controlled by by side, a' through one of said a ongitudinul slot there the other end of said dog, two cams one controlled by. the .ribbon on each spoo and each arranged, to be moved `into the path of said tri pin stantial ex austed from the corres ond'inv spool and1 each of said cams arranged to push said tripping device away from the corresponding spool and thus to throw the spool engagin end of the dog into engagement corresponding spoo 3. In: a typewriting machine mechanism, the combination spools arranged side by side, a driving shaft coaxia with said ribbon spool and having a lonitudinal slot therethrough, a dog pivota y mounted between its endsV in said slot and raving-one ofits ends formed for-engagement with either of said spools, a tripping -device on the other end of said dog,

and ribbon two cams each controlled by the ribbon on.

one of saidspools and arranged to be' moved into the path of said tri ping device when the ribbon is substantial exhausted from the corresponding one of',Y said spoolsand each of said cams arranged to push said tripping device away from the corresponding spool, anda retaining device secured to the outside of said4 shaft between said spools and en aging said dog to retain it in either of itsS i te positions.

4. In a typewriting inachineand in ribbon mechanism, the combination of two ribbon s ools arran ed side by side, a shaft exten ing throng one of said spools and having a longitudinal slot therethrough between tlie spools, a dog pivotallyl mounted between its ends in said s ot and av'ing one end arranged to engage either ribbon spool and hand-actuated means for shifting said dog from one spool to the other, said handactuated means including a wire extending longitudinally of said shaft and bent uid) at its end into said slot, and a notch in sai -dog engaged by the bent up end of said wire; lSigned at Syracuse, in the county of Onondaga, and Statev of New York, this 26th day of November A. D. 1909.

ARTHUR J.

VVitne'sses:

JOHN A. Pnoss, GEO. C. OarLoFi.

"device when the ribbon is sull of two ribbon naines.` i 

